That there is no danger of overstocking British Guiana with emigrants will appear by the following extract from an address of Mr. John Scoble, delivered at Albany Tuesday evening, Aug. 1st, 1839. He spoke of "British Guiana, a colony on the coast of South America, and one which some think will ere long rival in its wealth and population the State of New York. It is capable of sustaining a population of _forty millions_, though the actual number of the inhabitants is now only one hundred thousand." VI. OFFERS MADE TO SUCH FREE COLORED PERSONS OF THE UNITED STATES, AS MAY CHOOSE TO EMIGRATE TO BRITISH GUIANA. Mr. Carbery arrived at Baltimore in September last. He came to the United States partly for pleasure, and partly for the benefits of a change of climate. He had been but a few days at Baltimore, when his attention was attracted by the large number of free colored persons in that city; the difficulty they seemed to have in gaining a livelihood; and the discomforts of various kinds to which they are subjected. Knowing the great want of laborers in British Guiana, and the strong disposition, existing there, to encourage immigration, it immediately occurred to him, that by the transfer of a certain portion of the free colored people of the United States to Guiana, not only might a great benefit be done to that colony, but what all must regard as of still greater importance, a boon of vast value might be conferred upon the free colored people themselves. Much impressed by these considerations, Mr. Carbery procured a meeting of several of the free colored people of Baltimore, at which he proposed to them to select two of their own number, in whom they had confidence, whom he would send to British Guiana, free of expense, in order to give them an opportunity to examine the country, to judge for themselves, and to report to their brethren, what the prospects for immigrants really are. The free colored people of Baltimore, upon this suggestion and offer, organized a Committee of Emigration, of which Mr. Green was appointed chairman, and selected Messrs Peck and Price, two of their number, as delegates to visit Guiana. These delegates sailed, free of expense, in the barque Don Juan, from Boston, on the 21st of December last. The result of their mission is not yet known, the agents not having returned,--nor indeed has Mr. Carbery yet heard of their arrival in the colony. The news however of their arrival and reception is daily expected.